GN 411.2 Centring bore clamps


GN 411.2 Centring bore clamps, Steel Type: K - with clamping balls
Type: K - with clamping balls
GN 411.2 Centring bore clamps, Steel Type: K - with clamping balls GN 411.2 Centring bore clamps, Steel Type: S - with clamping segments

Product description


With centring bore clamps GN 411.2 workpieces can be centrally positioned and clamped from the inside of the bore.

They offer the following advantages:

- Precise self centering
- Repetitive accuracy: ± 0,025
- Accuracy of concentricity: ± 0,05
- Solid and stable clamping through either 3 or 6 contact points on the workpiece
- Clamping of workpieces with uneven or irregular surface (such as castings)
- Distortion free clamping
- Reduced height
- Can be fitted in any position
- Large adjustable range
- Draw-down clamping


  • hardened
  • blackened

Clamping balls / -segments
  • hardened
  • blank, ground


On request

Centring bore clamps GN 411.3
operable from the opposite side respectively for hydraulic or pneumatic operation

Centring bore clamps with 2 clamping elements for clamping tubes

Technical drawing

Hide technical drawing
GN 411.2 Centring bore clamps, Steel sketch

Article options / Table


Kwith clamping balls
Swith clamping segments
Show / Hide columns
w1w2Number of
in kN
11,7*14,2-M 44,31,5-2,53,53,98,66,3-0,71,330,5
14,518,512M 44,325,53,54,59,814,2561,22,333,5
18,522,515M 55,32,57,535,511,516,56,271,22,334
22,526,520M 66,4364714,119,6981,22,334,5
26,530,520M 66,4364,5714,119,8981,22,334,5
30,538,525M 66,4474,5914,123,2982,34,634,5
38,546,530M 88,447,54,5111827,212102,34,666,5
46,554,530M 88,447,54,5111827,112102,34,666,5
54,570,545M 1010,5595,51523,740,614124,79,268
70,586,560M 12135105,51728,346,117154,79,2610
86,5102,560M 16175105,52530,351,221154,79,2612,5
* This size is only available as type K.

Build & Price

Diameter d1


Operating principle

A circular ball cage containing 3 or 6 balls is forced outwards over an accurately guided cone by means of a screw which, through the exerted thrust, will enlarge the outside diameter of the circular ball cage. This in turn will lead to a firm contact between the centring clamp and bore of the workpiece.

Type K (with balls) is used for clamping applications where minute ball marks at the contact points with the workpiece are acceptable. Type S (with clamping segments) is used in such cases where marks at the clamping points on the workpiece would be acceptable.

Selected Part (How to order)

Weight: 0,012 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone+49 7723 6507 - 0
RoHS: Yes
This article conforms to RoHS, which means it complies with EU Directive 2011/65/EU for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).
Please note our quantity discounts.
With a total value (net) per order:
from 150 Euro -> 10 % discount
from 250 Euro -> 20 % discount
from 350 Euro -> 30 % discount
All prices in accordance with our price list No. 51, valid from 1 February 2018, plus VAT only valid for Germany.

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